Mounting and wiring
4.4
Ethernet interface (X610)
The CX2500-0061 system module supplies PoE-capable devices with voltage via the Ethernet interface
(X610). The required voltage is generated internally in the CX2500-0061 system module. An external power
supply unit is not necessary.
Devices that are not PoE-capable can also be connected to the Ethernet interface (X610). The CX2500-0061
system module checks connected devices before the start and tests them for their PoE capability.
Energy supply
The following methods are available for the energy supply and data rates of
up to 100 Mbit/s
:
• Mode A: the voltage is transmitted by the data cores of the Ethernet cable.
With this method the voltage for the energy supply is superimposed on the data signal. The same core
pairs (1/2 and 3/6) are used for the energy supply and the data transmission.
• Mode B: the voltage is transmitted by the free cores of the Ethernet cable.
With this method the free core pairs (4/5 and 7/8) are used to supply the voltage. The data
transmission and energy supply are cleanly separated.
Modes A and B are mixed for data rates of
1000 Mbit/s (Gigabit)
. The data transmission and energy supply
are not separated and the voltage for the energy supply is superimposed on the data signal.
Table 1: Pin assignment of the PoE-capable interface
PIN
Description
10, 100 Mbit/s
1000 Mbit/s (1 Gigabit/s)
Mode A
Mode B
Mode A
Mode B
1
Pair 2
Rx+ /
DC-
Rx +
TxRx+ /
DC-
TxRx+
2
Rx- /
DC-
Rx-
TxRx- /
DC-
TxRx-
3
Pair 3
Tx+ /
DC+
Tx+
TxRx+ /
DC+
TxRx+
4
Pair 1
-
DC+
TxRx+
TxRx+ /
DC+
5
-
DC+
TxRx-
TxRx- /
DC+
6
Pair 3
Tx- /
DC+
Tx -
TxRx- /
DC+
TxRx-
7
Pair 4
-
DC-
TxRx+
TxRx+ /
DC-
8
-
DC-
TxRx-
TxRx- /
DC-
Requirements for the Ethernet cable
• Mode A: a 4-core cable is adequate for 10BASE-T and 100BASE-TX Data rates of 10 and 100 Mbit/s
are supported.
An 8-core cable is required for 1000BASE-T. Data rates of 1000 Mbit/s are supported.
• Mode B: an 8-core cable is required for 10BASE-T, 100BASE-TX and 1000BASE-T. Speeds of 10, 100
and 1000 Mbit/s are supported.
Always use Cat5e Ethernet cables in order to be able to operate the maximum number of PoE devices from
different manufacturers. The maximum cable length is 100 m.
CX2500-0061
16
Version: 1.0
Содержание CX2500-0061
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